CN106641148B - Transmission assembly and lifting upright post - Google Patents
Transmission assembly and lifting upright post Download PDFInfo
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- CN106641148B CN106641148B CN201710016583.0A CN201710016583A CN106641148B CN 106641148 B CN106641148 B CN 106641148B CN 201710016583 A CN201710016583 A CN 201710016583A CN 106641148 B CN106641148 B CN 106641148B
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- transmission
- locking block
- nut
- tube
- fixedly connected
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2056—Telescopic screws with at least three screw members in coaxial arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
- B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/204—Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/209—Arrangements for driving the actuator using worm gears
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Transmission Devices (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention discloses a transmission assembly, belongs to the field of transmission devices, and solves the technical problem that the existing lifting upright post cannot be positively installed and inversely installed by adopting the same transmission assembly; a drive screw located within the hollow spindle; the hollow spindle is positioned with the first transmission nut in the axial direction in a rotatable mode, and a locking structure for limiting the rotation of the first transmission nut is arranged outside the first transmission nut; a second drive nut in threaded engagement with the hollow spindle; the sleeve is sleeved outside the hollow mandrel, and the second transmission nut is fixedly connected with the sleeve; a guide tube rotatably constrained within the sleeve. The invention also discloses a lifting upright post with the transmission assembly, and the transmission assembly can be used by the lifting upright post no matter the lifting upright post is installed normally or is installed reversely, so that the production cost is reduced.
Description
Technical Field
The invention belongs to the field of transmission devices, and particularly relates to a transmission assembly and a lifting upright post.
Background
The electric lifting column is widely applied to the fields of home furnishing, medical treatment and the like, a pipe body of the existing electric lifting column generally comprises an inner pipe, a middle pipe, an outer pipe and a bottom shell which are sequentially sleeved from inside to outside, a driving device arranged in the bottom shell and a transmission assembly which is matched with the driving device in a transmission way, in order to enable the stroke of the electric lifting column to be as large as possible, the transmission assembly is generally provided with a transmission screw rod and a hollow screw rod which are assembled together in a complete set, and the transmission nut is respectively arranged on the inner pipe and the middle pipe to be matched with the transmission screw rod and the hollow screw rod, so that the relative extension and retraction of the inner pipe, the middle.
The existing electric lifting upright post has two assembling modes of forward installation and reverse installation according to actual needs, wherein the forward installation of the lifting upright post means that the inner tube is connected with the bottom shell and the outer tube is supported on the ground, and the reverse installation of the lifting upright post means that the outer tube is connected with the bottom shell and the inner tube is supported on the ground. However, in the prior art, the upright lifting column and the inverted lifting column have different structures and need to be produced and assembled respectively, that is, the upright lifting column and the inverted lifting column cannot use the transmission assembly with the same structure, which undoubtedly increases the production cost.
Disclosure of Invention
The invention aims to provide a lifting upright post and solve the technical problem that the existing lifting upright post cannot be positively installed and inversely installed by adopting the same transmission assembly.
In order to solve the technical problems, the invention adopts the following technical scheme:
a drive assembly, comprising:
the hollow mandrel is provided with external threads on the outer wall;
the transmission screw rod is positioned in the hollow mandrel and can synchronously rotate with the hollow mandrel, and the transmission screw rod and the hollow mandrel can relatively extend and retract along the axial direction;
the hollow mandrel is positioned with the first transmission nut in the axial direction in a rotatable mode, and a locking structure for limiting the rotation of the first transmission nut is arranged outside the first transmission nut;
a second drive nut in threaded engagement with the hollow spindle;
the sleeve is sleeved outside the hollow mandrel, and the second transmission nut is fixedly connected with the sleeve;
a guide tube rotatably constrained within the sleeve, the guide tube rotating in synchronization with the hollow mandrel and the guide tube and the hollow mandrel being relatively retractable in an axial direction.
Further, the lower extreme fixedly connected with guide bar of cavity mandrel, the guide bar is non-cylindrical structure, the stand pipe has the non-circle hole, and non-cylindrical structure and non-circle hole fit for making cavity mandrel and stand pipe synchronous revolution.
Further, the hollow spindle is sleeved with a first bearing, and the first bearing is fixedly installed on the first transmission nut.
Further, the locking structure comprises a plurality of protrusions arranged on the outer wall of the first transmission nut and a first locking block and a second locking block which are located on the periphery of the first transmission nut, the first locking block is provided with a first accommodating groove, the second locking block is provided with a second accommodating groove, after the first locking block and the second locking block are locked, the first accommodating groove and the second accommodating groove are jointed to form an accommodating space, the first transmission nut is located in the accommodating space, a first clamping groove is formed in the groove wall of the first accommodating groove, a second clamping groove is formed in the groove wall of the second accommodating groove, and the first clamping groove and the second clamping groove correspond to a protrusion in clamping fit respectively.
Furthermore, the side of the butt joint of the first locking block and the second locking block is provided with a first fixing column and a first fixing hole, the side of the butt joint of the second locking block and the first locking block is provided with a second fixing column and a second fixing hole, after the first locking block and the second locking block are locked, the first fixing column is inserted into the second fixing hole, and the second fixing column is inserted into the first fixing hole.
Further, a second bearing is sleeved on the transmission screw rod and fixed in a bearing seat.
The invention also discloses a lifting upright post, which comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the inner tube, a driving device arranged in the bottom shell and a transmission assembly in transmission fit with the driving device, wherein the inner tube, the middle tube, the outer tube, the bottom shell fixedly connected with the upper end of the inner tube, the driving device arranged in the bottom shell and the transmission assembly in transmission fit with the driving device are sequentially sleeved from inside to outside, the driving assembly is in transmission fit with the upper end of the guide tube, the lower end of the outer tube is provided with a bottom plate, the lower end of the transmission screw rod is positioned with the bottom plate in an axial direction in a rotatable mode, the locking structure.
Further, drive arrangement includes the motor, connects worm on the motor output shaft, with worm transmission complex worm wheel, be equipped with the abnormal shape hole on the worm wheel, the power transmission is realized through the first abnormal shape body of rod in the hole of stand pipe and abnormal shape hole.
The invention also discloses another lifting upright post which comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the outer tube, a driving device arranged in the bottom shell and a transmission assembly in transmission fit with the driving device, wherein the inner tube, the middle tube and the outer tube are sequentially sleeved from inside to outside, the transmission assembly is the transmission assembly in any technical scheme, the driving device is in transmission fit with the upper end of a transmission screw rod, the locking structure is fixedly connected with the upper end of the middle tube and abuts against the lower end face of the inner tube.
Furthermore, drive arrangement includes the motor, connects the worm on the motor output shaft, with worm transmission complex worm wheel, be equipped with the abnormal shape hole on the worm wheel, power transmission is realized through the second abnormal shape body of rod in drive screw and abnormal shape hole.
The invention has the beneficial effects that:
1. the transmission screw, the hollow mandrel and the guide pipe can synchronously rotate, so that the transmission screw and the guide pipe can be used as power input ends, and the transmission assembly can adapt to the assembling requirements of upright installation and inverted installation of the lifting upright column only by turning over up and down, so that the upright installation and inverted installation process of the lifting upright column can be met only by producing one type of transmission assembly, and the production cost is greatly reduced;
2. the guide pipe is provided with a non-circular inner hole, and the lower end of the hollow mandrel is fixedly connected with the guide rod of a non-cylindrical structure, so that when the guide rod and the guide pipe rotate synchronously, the guide rod can also perform linear telescopic motion along the non-circular inner hole, the guide pipe not only can be used as an input end of power, but also can play a role in guiding the hollow shaft, and the stability of a transmission assembly is improved;
3. the hollow mandrel is arranged on the first transmission nut through the first bearing sleeved on the upper part of the hollow mandrel, so that the hollow mandrel and the first transmission nut are axially positioned, the hollow mandrel and the first sleeve are synchronously lifted, the hollow mandrel can be ensured to rotate more stably due to the supporting action of the first transmission nut, and the installation structure of the first bearing and the first transmission nut is more compact;
4. the locking structure locks the first transmission nut through the matching of the grooves on the first locking block and the second locking block and the bulge of the first transmission nut so as to limit the rotation of the first transmission nut, so that the screwless installation of the locking structure and the first transmission nut is realized, and the installation process is simplified;
5. the lifting upright post adopts the transmission assembly with the advantages, the locking structure is fixedly connected with the upper end or the lower end of the middle pipe, and the driving device is in transmission fit with the upper end of the guide pipe or the upper end of the transmission screw rod, so that the transmission assembly with the same structure can realize the forward installation or the inverted installation of the lifting upright post, the installation structure is very compact, the installation process is quick and convenient, and the installation cost is reduced;
6. the driving device adopted by the lifting upright post realizes power transmission through the special-shaped hole arranged on the worm wheel and the special-shaped rod body arranged on the transmission screw rod, so that parts for driving connection are simplified to the greatest extent, and the reliability of power transmission is obviously improved.
The specific technical effects of the present invention will be further explained in the detailed description.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description:
FIG. 1 is a cross-sectional view of a drive assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a transmission assembly according to a first embodiment of the present invention;
FIG. 3 is a cross-sectional view of a lifting column in a second embodiment of the invention;
FIG. 4 is an enlarged view of a portion of area A of FIG. 3;
FIG. 5 is a cross-sectional view of a lifting column in a third embodiment of the invention;
fig. 6 is a partially enlarged view of the region B in fig. 5.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 and 2, a drive assembly includes a hollow spindle 1, a drive screw 2, a first drive nut 3, a second drive nut 4, a sleeve 5, and a guide tube 6. The outer wall of the hollow mandrel 1 is provided with external threads, the transmission screw 2 is positioned in the hollow mandrel 1, the transmission screw 2 can synchronously rotate with the hollow mandrel 1, and the transmission screw 2 and the hollow mandrel 1 can relatively extend and retract along the axial direction. The first transmission nut 3 is in threaded fit with the transmission screw rod 2, the second transmission nut 4 is in threaded fit with the hollow spindle 1, the sleeve 5 is sleeved outside the hollow spindle 1, the second transmission nut 4 is fixedly connected with the upper end of the sleeve 5, the bottom of the sleeve 5 is provided with the bottom cover 51, the guide pipe 6 is accommodated inside the sleeve 5 and limited between the second transmission nut 4 and the bottom cover 51, therefore, the guide pipe 6 is limited in the sleeve 5 in a rotatable mode, the guide pipe 6 and the hollow spindle 1 rotate synchronously, and the guide pipe 6 and the hollow spindle 1 can stretch out and draw back relatively along the axial direction.
The lower extreme fixedly connected with transmission part 21 of drive screw 2, the lower extreme fixedly connected with guide bar 11 of cavity mandrel 1, guide bar 11 and transmission part 21 are the non-cylinder structure, cavity mandrel 1 all has the non-circular hole with stand pipe 6, the non-cylinder structure of transmission part 21 and the non-circular hole of cavity mandrel 1 adapt to make drive screw 2 and cavity mandrel 1 synchronous revolution, the non-cylinder structure of guide bar 11 and the non-circular hole of stand pipe 6 adapt to make cavity mandrel 1 and stand pipe 6 synchronous revolution. In this embodiment, the non-cylindrical structure that guide bar 11 and transmission part 21 preferably adopted is including the cylinder and establish the convex key on the cylinder face, the non-circular hole of well hollow mandrel 1 and stand pipe 6 all includes circular hole and establishes the keyway on the pore wall of circular hole, convex key on the transmission part 21 and the cooperation of the keyway joint on the well hollow mandrel 1, and then realize transmission screw 2 and the power transmission of well hollow mandrel 1, convex key on the guide bar 11 and the cooperation of the keyway joint on the stand pipe 6, and then realize the power transmission of well hollow mandrel 1 and stand pipe 6. It should be noted that the non-cylindrical structure and the non-circular inner hole are not limited to the above structure, and may be implemented by any non-cylindrical structure and non-circular inner hole, which can realize the power transmission between the transmission screw 2 and the hollow spindle 1 and between the hollow spindle 1 and the guide tube 6, such as the fitting of a D-shaped rod and a D-shaped hole, and the fitting of a polygonal rod and a polygonal hole.
In this embodiment, the hollow spindle 1 is sleeved with a first bearing 12, the first bearing 12 is fixedly installed on the first transmission nut 3, specifically, a step surface parallel to the upper end surface of the hollow spindle 1 is milled on the upper end surface of the hollow spindle 1, the first bearing is installed on the step surface, an annular clamping groove is machined on the milled shaft surface of the upper end of the hollow spindle 1, a clamp spring 13 is installed in the annular clamping groove, and the clamp spring 13 abuts against the upper end surface of the first bearing 12, so that the hollow spindle 1 is rotatably positioned with the first transmission nut 3 in the axial direction. The hollow spindle 1 can stably rotate through the first bearing 12, synchronous linear motion of the hollow spindle 1 and the first bearing 12 can be achieved, the connecting structure is very compact, and the size of a transmission assembly is favorably reduced.
In this embodiment, a locking structure 7 for limiting rotation of the first transmission nut 3 is disposed outside the first transmission nut 3, the locking structure 7 includes a plurality of protrusions 7a disposed on an outer wall of the first transmission nut 3, and a first locking block 71 and a second locking block 72 disposed at an outer periphery of the first transmission nut 3, the first locking block 71 is disposed with a first receiving groove, the second locking block 72 is disposed with a second receiving groove, after the first locking block 71 and the second locking block 72 are locked, the first receiving groove and the second receiving groove are joined to form a receiving space, the first transmission nut 3 is disposed in the receiving space, a first clamping groove 71a is disposed on a wall of the first receiving groove, a second clamping groove is disposed on a wall of the second receiving groove, and the first clamping groove 71a and the second clamping groove correspond to one protrusion 7a of the clamping fit respectively.
In this embodiment, a first fixing column 711 and a first fixing hole 712 are disposed on a side surface of the first locking block 71 abutting against the second locking block 72, a second fixing column and a second fixing hole are disposed on a side surface of the second locking block 72 abutting against the first locking block 71, the first locking block 71 and the second locking block 72 are inserted into the second fixing hole through the first fixing column 711 after being locked, and the second fixing column is inserted into the first fixing hole 712, so that the first locking block 71 and the second locking block 72 are limited to move in the axial direction of the lifting assembly, that is, the first locking block 71 and the second locking block 72 lock the first transmission nut 3. Because first draw-in groove 71a and second draw-in groove 72a cooperate with a arch 7a joint respectively, and transmission assembly installs back locking structure 7 in the lift stand and is being by fixed mounting, consequently locking structure 7 is just realized first drive nut 3 by the restriction rotation, so when cavity mandrel 1 is rotatory, locking structure 7 will carry out linear movement with first drive nut 3 relative cavity mandrel 1, and locking structure 7 also acts as power transmission part drive lift this moment.
Example two:
as shown in fig. 1, 3 and 4, the lifting column of the present embodiment includes an inner tube 81, a middle tube 82, an outer tube 83, a bottom shell 84 fixedly connected to an upper end of the inner tube 81, a driving device 9 disposed in the bottom shell 84, and a transmission assembly in transmission fit with the driving device 9, the transmission assembly is the transmission assembly in the first embodiment, the transmission assembly in fig. 3 is installed upside down as the transmission assembly in fig. 1, the driving device 9 is in transmission fit with an upper end of the guide tube 6, a bottom plate 831 is disposed at a lower end of the outer tube 83, the locking structure 7 is fixedly connected to a lower end of the middle tube 82, a top plate 811 is disposed at an upper end of the inner tube 81, the top plate 811 is fixed to an upper end surface of the sleeve 5 by a bolt, and the top plate 811 is also fixedly connected to the bottom shell 84 by a bolt, so as to fixedly connect the sleeve 5 to.
The lower end of the transmission screw 2 is sleeved with a second bearing 22, the second bearing 22 is fixed in a bearing seat 23, the bearing seat 23 is provided with a containing groove, the second bearing 22 is installed in the containing groove, the bearing seat 23 is fixedly connected with the upper end face of the bottom plate 831, and the bottom plate 831 covers the opening of the containing groove, so that the second bearing 22 is limited in the containing groove by the bottom plate 831 and cannot be separated, the lower end of the transmission screw 2 is axially positioned with the bottom plate 831 in a rotatable mode, in order to enable the transmission screw 2 and the second bearing 22 to be stably assembled, the lower end of the transmission screw 2 is provided with a screw hole 24, the lower end of the transmission screw 2 is sleeved with a pressing block 25, the bottom plate 831 is provided with a pressing block 25 which penetrates through the through hole 831a, the pressing block 25 penetrates through a bolt.
As shown in fig. 2 and 4, in the present embodiment, the driving device 9 includes a motor 91, a worm 92 connected to an output shaft of the motor 91, and a worm wheel 93 in transmission fit with the worm 92, a profiled hole 931 is formed on the worm wheel 93, the inner hole and the profiled hole 931 of the guide tube 6 realize power transmission through the first profiled rod 61, the first profiled rod 61 includes a first input end 611 and a first output end 612, the first input end 611 and the first output end 612 are both in a non-cylindrical structure and preferably adopt a hexagonal rod structure, the profiled hole 931 and the inner hole of the guide tube 6 preferably adopt a hexagonal hole, the first input end 611 and the profiled hole 931 are fitted, and the first output end 612 and the inner hole of the guide tube 6 are fitted, so as to realize power transmission between the worm wheel 93 and the guide tube 6.
The operation process of the lifting upright column of the embodiment is as follows: the motor 91 in the driving device 9 drives the worm 92 to rotate, the worm 92 drives the worm wheel 93 to rotate, the worm wheel 93 drives the guide tube 6 to rotate through the first special-shaped rod body 61, the guide tube 6 drives the hollow mandrel 1 through the guide rod 11, the hollow mandrel 1 drives the transmission screw rod 2 to rotate through the transmission part 21, therefore, the guide tube 6, the hollow mandrel 1 and the transmission screw rod 2 are driven by the worm wheel 93 to synchronously rotate, because the transmission screw rod 2 and the bottom plate 83 are limited in the axial direction, the first transmission nut 3 is lifted along the axial direction of the transmission screw rod 2, the first transmission nut 3 drives the middle tube 92 to lift through the locking structure 7, the hollow mandrel 1 is lifted along with the first transmission nut 3 while rotating, the second transmission nut 4 is lifted along the axial direction of the hollow mandrel 1, the second transmission nut 4 drives the driving device 9 to lift through the guide tube 6, the driving device 9 drives the bottom shell 84 and the outer tube 93 connected with the bottom shell 84 to ascend and descend, so that the ascending and descending of the ascending and descending upright column are realized. In the process, the guide rod 11 generates linear displacement along the inner hole of the guide pipe 6, and the guide pipe 6 plays a role in guiding the hollow shaft 1, so that the transmission assembly is not easy to radially shake, and the operation of the transmission assembly can be more stable.
Example three:
as shown in fig. 2, 5 and 6, the difference between the present embodiment and the second embodiment is that the bottom shell 84 in the lifting column is fixedly connected to the upper end of the outer tube 83, the driving device 9 is in transmission fit with the upper end of the transmission screw 2, the locking structure 7 is fixedly connected to the upper end of the middle tube 82, the transmission assembly is the transmission assembly in fig. 2, the installation direction of the transmission assembly is opposite to that of the second embodiment, the bottom plate 831 in the second embodiment is located at the upper end of the outer tube 83, the bottom plate 831 is fixedly connected to the bottom shell 84 through bolts, the top plate 811 in the second embodiment is located at the lower end of the inner tube 81, and the lower end of the sleeve 5 is fixedly connected to the top plate 811 through bolts, so that the lower end of the sleeve 5 abuts against the lower end.
In the present embodiment, the power transmission between the worm gear 93 and the worm screw 2 is realized by the second special-shaped rod 27 through the transmission screw 2 and the special-shaped hole 931, the second special-shaped rod 27 includes a second input end 271 and a second output end 272, the second input end 271 and the second output end 272 are both of a non-cylindrical structure and preferably adopt a hexagonal rod structure, the special-shaped hole 931 preferably adopts a hexagonal hole, the second input end 271 is adapted to the special-shaped hole 931, and the second output end 272 and the transmission screw 2 are fixedly connected through a bolt, so as to realize the power transmission between the worm gear 93 and the transmission screw 2.
The operation principle of the lifting column of this embodiment is substantially the same as that of the second embodiment, except that the worm wheel 93 drives the driving screw 2 to rotate through the second special-shaped rod 27, at this time, the driving screw 2 is a driving rotating part, and the guide tube 6 is a driven rotating part.
The foregoing has been a description of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and those skilled in the art can make various changes and modifications according to the present invention within the scope defined by the appended claims without departing from the spirit of the present invention.
Claims (11)
1. A drive assembly, comprising:
the hollow mandrel is provided with external threads on the outer wall;
the transmission screw rod is positioned in the hollow mandrel and can synchronously rotate with the hollow mandrel, and the transmission screw rod and the hollow mandrel can relatively extend and retract along the axial direction;
the hollow mandrel is positioned with the first transmission nut in the axial direction in a rotatable mode, and a locking structure for limiting the rotation of the first transmission nut is arranged outside the first transmission nut;
a second drive nut in threaded engagement with the hollow spindle;
the sleeve is sleeved outside the hollow mandrel, and the second transmission nut is fixedly connected with the sleeve;
a guide tube rotatably constrained within the sleeve, the guide tube rotating in synchronization with the hollow mandrel and the guide tube and the hollow mandrel being relatively retractable in an axial direction.
2. A drive assembly as claimed in claim 1, wherein a guide rod is fixedly connected to the lower end of the hollow spindle, the guide rod being of non-cylindrical configuration, the guide tube having a non-circular bore, the non-cylindrical configuration being adapted to allow the hollow spindle and the guide tube to rotate in unison.
3. A drive assembly according to claim 1, wherein the hollow spindle is sleeved with a first bearing, the first bearing being fixedly mounted on a first drive nut.
4. The transmission assembly according to claim 1, wherein the locking structure includes a plurality of protrusions disposed on an outer wall of the first transmission nut, and a first locking block and a second locking block disposed at an outer periphery of the first transmission nut, the first locking block is provided with a first receiving groove, the second locking block is provided with a second receiving groove, after the first locking block and the second locking block are locked, the first receiving groove and the second receiving groove are joined to form a receiving space, the first transmission nut is disposed in the receiving space, a first engaging groove is disposed on a wall of the first receiving groove, a second engaging groove is disposed on a wall of the second receiving groove, and the first engaging groove and the second engaging groove are respectively engaged with a protrusion.
5. The transmission assembly according to claim 4, wherein a first fixing column and a first fixing hole are arranged on a side surface of the first locking block, which is in butt joint with the second locking block, a second fixing column and a second fixing hole are arranged on a side surface of the second locking block, which is in butt joint with the first locking block, after the first locking block and the second locking block are locked, the first fixing column is inserted into the second fixing hole, and the second fixing column is inserted into the first fixing hole.
6. A drive assembly according to any one of claims 1 to 5, wherein the drive screw is fitted with a second bearing, the second bearing being fixed in a bearing block.
7. A lifting upright column comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the inner tube, a driving device arranged in the bottom shell and a transmission assembly in transmission fit with the driving device, which are sequentially sleeved from inside to outside, and is characterized in that the transmission assembly is the transmission assembly in any one of claims 1 to 6, the driving device is in transmission fit with the upper end of a guide tube, the lower end of the outer tube is provided with a bottom plate, the lower end of a transmission screw rod is axially positioned with the bottom plate in a rotatable manner, a locking structure is fixedly connected with the lower end of the middle tube, and a sleeve is fixedly connected with the bottom shell.
8. The lifting column according to claim 7, wherein the driving device comprises a motor, a worm connected to an output shaft of the motor, and a worm wheel in transmission fit with the worm, the worm wheel is provided with a profiled hole, and the inner hole and the profiled hole of the guide tube realize power transmission through the first profiled rod body.
9. A lifting upright column comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the outer tube, a driving device arranged in the bottom shell and a transmission assembly in transmission fit with the driving device, which are sequentially sleeved from inside to outside, and is characterized in that the transmission assembly is the transmission assembly in any one of claims 1 to 6, the driving device is in transmission fit with the upper end of a transmission screw rod, a locking structure is fixedly connected with the upper end of the middle tube, and the lower end of a sleeve is abutted against the lower end face of the inner tube.
10. The lifting column of claim 9, wherein the drive screw is sleeved with a second bearing, and the second bearing is fixed in a bearing seat fixedly connected with the bottom shell.
11. The lifting column according to claim 9, wherein the driving device comprises a motor, a worm connected to an output shaft of the motor, and a worm wheel in transmission fit with the worm, the worm wheel is provided with a profiled hole, and the transmission screw and the profiled hole realize power transmission through the second profiled rod body.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016583.0A CN106641148B (en) | 2017-01-10 | 2017-01-10 | Transmission assembly and lifting upright post |
| JP2019557665A JP6850363B2 (en) | 2017-01-10 | 2018-01-08 | Transmission assembly and lifting column |
| US16/477,177 US11454306B2 (en) | 2017-01-10 | 2018-01-08 | Transmission assembly and lifting column |
| PCT/CN2018/071763 WO2018130127A1 (en) | 2017-01-10 | 2018-01-08 | Drive assembly and lifting column |
| EP18738760.0A EP3575634A4 (en) | 2017-01-10 | 2018-01-08 | Drive assembly and lifting column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016583.0A CN106641148B (en) | 2017-01-10 | 2017-01-10 | Transmission assembly and lifting upright post |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106641148A CN106641148A (en) | 2017-05-10 |
| CN106641148B true CN106641148B (en) | 2020-09-18 |
Family
ID=58843585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710016583.0A Active CN106641148B (en) | 2017-01-10 | 2017-01-10 | Transmission assembly and lifting upright post |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11454306B2 (en) |
| EP (1) | EP3575634A4 (en) |
| JP (1) | JP6850363B2 (en) |
| CN (1) | CN106641148B (en) |
| WO (1) | WO2018130127A1 (en) |
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| CN106641148B (en) * | 2017-01-10 | 2020-09-18 | 浙江捷昌线性驱动科技股份有限公司 | Transmission assembly and lifting upright post |
| DE102017127937A1 (en) * | 2017-11-27 | 2019-05-29 | Logicdata Electronic & Software Entwicklungs Gmbh | Telescopic linear actuator and height-adjustable table |
| DE102018119426B4 (en) * | 2018-08-09 | 2021-05-12 | Logicdata Electronic & Software Entwicklungs Gmbh | Adjustable lifting column and adjustable table system |
| CN108946591A (en) * | 2018-08-22 | 2018-12-07 | 国家电网公司 | A kind of working messenger wire lifting device of electrical line setting |
| CN109399502B (en) * | 2018-10-10 | 2020-09-18 | 浙江捷昌线性驱动科技股份有限公司 | Transmission assembly for lifting upright column and lifting upright column |
| CN109678089A (en) * | 2018-12-29 | 2019-04-26 | 宁波海仕凯驱动科技有限公司 | A kind of drive assembly and lifting column |
| CN109812556A (en) * | 2019-01-31 | 2019-05-28 | 宁波海仕凯驱动科技有限公司 | A kind of drive assembly and lifting column |
| JP7396854B2 (en) * | 2019-10-30 | 2023-12-12 | ファナック株式会社 | linear motion mechanism |
| CN110980572A (en) * | 2019-12-03 | 2020-04-10 | 浙江捷昌线性驱动科技股份有限公司 | Lifting upright post with low installation distance |
| CN111120604A (en) * | 2020-01-10 | 2020-05-08 | 浙江乐歌智能驱动科技有限公司 | Synchronous different-lead linear transmission assembly and lifting upright post |
| CN111409100B (en) * | 2020-04-16 | 2021-09-07 | 广东博智林机器人有限公司 | Telescopic mechanism, mechanical arm and construction robot |
| US11338777B2 (en) * | 2020-05-26 | 2022-05-24 | Sos Solutions, Inc. | Two speed trailer jack |
| CN112727873A (en) * | 2021-01-29 | 2021-04-30 | 浙江护童人体工学科技股份有限公司 | Flexible assembly and lift stand |
| CN113193694A (en) * | 2021-05-28 | 2021-07-30 | 深圳市兆威机电股份有限公司 | Linear motor and device using same |
| CN114314451A (en) * | 2021-12-24 | 2022-04-12 | 乐歌人体工学科技股份有限公司 | Linear transmission assembly and lifting upright post |
| CN114876921A (en) * | 2022-03-30 | 2022-08-09 | 乐歌人体工学科技股份有限公司 | Transmission rod assembly and lifting table thereof |
| CN117559720B (en) * | 2023-12-05 | 2024-04-19 | 南通市久正人体工学股份有限公司 | Motor driving structure and lifting device |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3575634A1 (en) | 2019-12-04 |
| JP6850363B2 (en) | 2021-03-31 |
| CN106641148A (en) | 2017-05-10 |
| EP3575634A4 (en) | 2020-11-18 |
| US20190360567A1 (en) | 2019-11-28 |
| WO2018130127A1 (en) | 2018-07-19 |
| JP2020505569A (en) | 2020-02-20 |
| US11454306B2 (en) | 2022-09-27 |
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